We're going to solve 7401 multiplied by 2166
7401 × 2166 = 2166 × (7401)
+ 2166 × 1 which equals 2166
+ 2166 × 00 which equals 0
+ 2166 × 400 what gives us 866400
+ 2166 × 7000 giving us 15162000

= 16030566
